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Temperature-insensitive polarimetric vibration sensor based on HiBi microstructured optical fiber

Publication date 2012
B-Phot Authors Thomas Geernaert, Francis Berghmans, Hugo Thienpont
Citation
K. Chah et al., “Temperature-insensitive polarimetric vibration sensor based on HiBi microstructured optical fiber,” APPLIED OPTICS, vol. 51, no. 25, pp. 6130–6138, 2012.
Abstract A new type of highly birefringent microstructured optical fiber has been tested for vibration measurements using a polarimetric technique. This technique takes advantage of the stress-induced phase shift between the two orthogonally polarized fiber eigenmodes. Comparison of three different fiber types shows that standard single-mode fibers do not provide stable measurements and that conventional polarization-maintaining fibers lead to a significant cross-sensitivity to temperature. However, for highly birefringent microstructured fibers specifically designed to provide a temperature-independent birefringence, our experiments show repeatable vibration measurements over a frequency range extending from 50 Hz to 1 kHz that are unaffected by temperature variations (up to 120 degrees C).
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